Ink cartridge



FIG. 1 is a top, front and right side perspective view of an ink cartridge according to the present design;

FIG. 2 is a bottom, front and left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is a left side elevational view thereof.

The broken lines are shown for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an ink cartridge, as shown and described. 